APA (7th ed.) Citation

National Geographic Society (U.S.) & Warner Home Video (Firm). (2006). Sky monsters.

Chicago Style (17th ed.) Citation

National Geographic Society (U.S.) and Warner Home Video (Firm). Sky Monsters. 2006.

MLA (9th ed.) Citation

National Geographic Society (U.S.) and Warner Home Video (Firm). Sky Monsters. 2006.

Warning: These citations may not always be 100% accurate.